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If it's true that the ALTER TABLE x ADD CONSTRAINT x CHECK (x) syntax is

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supported in 7.1.1, here is a patch to that alter_table.sgml that documents
it.

Christopher Kings-Lynne
This commit is contained in:
Bruce Momjian 2001-05-09 13:27:15 +00:00
parent 6cda3ad8fe
commit 1ef9338ab6
1 changed files with 10 additions and 6 deletions
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16
doc/src/sgml/ref/alter_table.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.23 2001/05/07 00:43:15 tgl Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.24 2001/05/09 13:27:15 momjian Exp $
Postgres documentation
-->
@ -207,13 +207,10 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
</para>
<para>
In the current implementation, only FOREIGN KEY constraints can
In the current implementation, only FOREIGN KEY and CHECK constraints can
be added to a table. To create or remove a unique constraint, create
a unique index (see <xref linkend="SQL-CREATEINDEX"
endterm="SQL-CREATEINDEX-title">). To add check constraints
you need to recreate and reload the table, using other
parameters to the <xref linkend="SQL-CREATETABLE"
endterm="SQL-CREATETABLE-title"> command.
endterm="SQL-CREATEINDEX-title">).
</para>
<para>
@ -256,6 +253,13 @@ ALTER TABLE distributors RENAME TO suppliers;
</programlisting>
</para>
<para>
To add a check constraint to a table:
<programlisting>
ALTER TABLE distributors ADD CONSTRAINT zipchk CHECK (char_length(zipcode) = 5)
</programlisting>
</para>
<para>
To add a foreign key constraint to a table:
<programlisting>